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13 Cards in this Set
- Front
- Back
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Nissl substance is composed of...
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Rough endoplasmic reticulum and polysomes
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What are the supporting cells in the central nervous system?
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Astrocytes, microglia, and olidodendrocytes
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what is the cell of origin for the most aggressive and devastating brain tumors?
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astrocytes
(brain tumor called astrocytoma) |
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what cell produces myelin in the CNS?
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oligodendrocytes
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which supportive cell is highly phagocytic in the brain?
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microglia
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"brain macrophages"
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microglial cells
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what is the origin of microglia cells?
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mesoderm
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where are schwann cells located?
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in the peripheral nervous system
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the stoichiometry of schwann cells to axons
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1:1 ratio
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which autoimmune condition is more debilitating and why?
Multiple sclerosis or Guillain-Barre syndrome |
Multiple sclerosis is much more complex and difficult to repair because this disease targets oligodendrocytes in the central nervous system, whereas Guillain- Barre syndrome involves the peripheral nervous system
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what type of connective tissue in the PNS is synonymous with endomysium in muscles?
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endoneurium
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What type of connective tissue constitutes the blood-nerve barrier in the PNS?
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perineurium
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What type of dense connective tissue surrounds the entire nerve?
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epineurium
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